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Commit | Line | Data |
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74b2466e LP |
1 | #pragma once |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2014 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU Lesser General Public License as published by | |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | Lesser General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU Lesser General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
3c0cf502 LP |
22 | #include "in-addr-util.h" |
23 | ||
74b2466e | 24 | typedef struct DnsServer DnsServer; |
74b2466e | 25 | |
4e945a6f LP |
26 | typedef enum DnsServerType { |
27 | DNS_SERVER_SYSTEM, | |
28 | DNS_SERVER_FALLBACK, | |
29 | DNS_SERVER_LINK, | |
30 | } DnsServerType; | |
e3309036 ZJS |
31 | #define _DNS_SERVER_TYPE_MAX (DNS_SERVER_LINK + 1) |
32 | ||
33 | const char* dns_server_type_to_string(DnsServerType i) _const_; | |
34 | DnsServerType dns_server_type_from_string(const char *s) _pure_; | |
4e945a6f | 35 | |
be808ea0 TG |
36 | typedef enum DnsServerFeatureLevel { |
37 | DNS_SERVER_FEATURE_LEVEL_TCP, | |
38 | DNS_SERVER_FEATURE_LEVEL_UDP, | |
9c5e12a4 | 39 | DNS_SERVER_FEATURE_LEVEL_EDNS0, |
7586f4d1 | 40 | DNS_SERVER_FEATURE_LEVEL_DO, |
d74fb368 | 41 | DNS_SERVER_FEATURE_LEVEL_LARGE, |
be808ea0 TG |
42 | _DNS_SERVER_FEATURE_LEVEL_MAX, |
43 | _DNS_SERVER_FEATURE_LEVEL_INVALID = -1 | |
44 | } DnsServerFeatureLevel; | |
45 | ||
46 | #define DNS_SERVER_FEATURE_LEVEL_WORST 0 | |
47 | #define DNS_SERVER_FEATURE_LEVEL_BEST (_DNS_SERVER_FEATURE_LEVEL_MAX - 1) | |
48 | ||
49 | const char* dns_server_feature_level_to_string(int i) _const_; | |
50 | int dns_server_feature_level_from_string(const char *s) _pure_; | |
51 | ||
3e684349 | 52 | #include "resolved-link.h" |
be808ea0 | 53 | #include "resolved-manager.h" |
3e684349 | 54 | |
74b2466e LP |
55 | struct DnsServer { |
56 | Manager *manager; | |
74b2466e | 57 | |
91b14d6f TG |
58 | unsigned n_ref; |
59 | ||
4e945a6f | 60 | DnsServerType type; |
3c0cf502 LP |
61 | Link *link; |
62 | ||
0dd25fb9 | 63 | int family; |
74b2466e | 64 | union in_addr_union address; |
2817157b | 65 | int ifindex; /* for IPv6 link-local DNS servers */ |
74b2466e | 66 | |
6cb08a89 LP |
67 | char *server_string; |
68 | ||
9df3ba6c TG |
69 | usec_t resend_timeout; |
70 | usec_t max_rtt; | |
71 | ||
f4461e56 LP |
72 | DnsServerFeatureLevel verified_feature_level; |
73 | DnsServerFeatureLevel possible_feature_level; | |
de54e62b | 74 | |
d74fb368 | 75 | size_t received_udp_packet_max; |
de54e62b | 76 | |
6bb2c085 LP |
77 | unsigned n_failed_udp; |
78 | unsigned n_failed_tcp; | |
de54e62b | 79 | |
6bb2c085 | 80 | bool packet_truncated:1; |
de54e62b LP |
81 | bool packet_bad_opt:1; |
82 | bool packet_rrsig_missing:1; | |
83 | ||
be808ea0 TG |
84 | usec_t verified_usec; |
85 | usec_t features_grace_period_usec; | |
74b2466e | 86 | |
1e02e182 LP |
87 | /* Whether we already warned about downgrading to non-DNSSEC mode for this server */ |
88 | bool warned_downgrade:1; | |
89 | ||
b652d4a2 LP |
90 | /* Used when GC'ing old DNS servers when configuration changes. */ |
91 | bool marked:1; | |
92 | ||
0eac4623 LP |
93 | /* If linked is set, then this server appears in the servers linked list */ |
94 | bool linked:1; | |
74b2466e LP |
95 | LIST_FIELDS(DnsServer, servers); |
96 | }; | |
97 | ||
98 | int dns_server_new( | |
99 | Manager *m, | |
0b58db65 | 100 | DnsServer **ret, |
4e945a6f | 101 | DnsServerType type, |
0b58db65 | 102 | Link *link, |
0dd25fb9 | 103 | int family, |
2817157b LP |
104 | const union in_addr_union *address, |
105 | int ifindex); | |
74b2466e | 106 | |
91b14d6f TG |
107 | DnsServer* dns_server_ref(DnsServer *s); |
108 | DnsServer* dns_server_unref(DnsServer *s); | |
87f5a193 | 109 | |
0eac4623 | 110 | void dns_server_unlink(DnsServer *s); |
0b58db65 | 111 | void dns_server_move_back_and_unmark(DnsServer *s); |
0eac4623 | 112 | |
6bb2c085 LP |
113 | void dns_server_packet_received(DnsServer *s, int protocol, DnsServerFeatureLevel level, usec_t rtt, size_t size); |
114 | void dns_server_packet_lost(DnsServer *s, int protocol, DnsServerFeatureLevel level, usec_t usec); | |
6bb2c085 | 115 | void dns_server_packet_truncated(DnsServer *s, DnsServerFeatureLevel level); |
de54e62b LP |
116 | void dns_server_packet_rrsig_missing(DnsServer *s, DnsServerFeatureLevel level); |
117 | void dns_server_packet_bad_opt(DnsServer *s, DnsServerFeatureLevel level); | |
d001e0a3 | 118 | void dns_server_packet_rcode_downgrade(DnsServer *s, DnsServerFeatureLevel level); |
9df3ba6c | 119 | |
f4461e56 LP |
120 | DnsServerFeatureLevel dns_server_possible_feature_level(DnsServer *s); |
121 | ||
519ef046 LP |
122 | int dns_server_adjust_opt(DnsServer *server, DnsPacket *packet, DnsServerFeatureLevel level); |
123 | ||
6cb08a89 | 124 | const char *dns_server_string(DnsServer *server); |
2817157b | 125 | int dns_server_ifindex(const DnsServer *s); |
6cb08a89 | 126 | |
92ec902a LP |
127 | bool dns_server_dnssec_supported(DnsServer *server); |
128 | ||
1e02e182 LP |
129 | void dns_server_warn_downgrade(DnsServer *server); |
130 | ||
b9fe94ca MP |
131 | bool dns_server_limited_domains(DnsServer *server); |
132 | ||
2817157b | 133 | DnsServer *dns_server_find(DnsServer *first, int family, const union in_addr_union *in_addr, int ifindex); |
4b95f179 LP |
134 | |
135 | void dns_server_unlink_all(DnsServer *first); | |
136 | void dns_server_unlink_marked(DnsServer *first); | |
137 | void dns_server_mark_all(DnsServer *first); | |
f2f1dbe5 | 138 | |
4b95f179 | 139 | DnsServer *manager_get_first_dns_server(Manager *m, DnsServerType t); |
636e813d | 140 | |
0eac4623 | 141 | DnsServer *manager_set_dns_server(Manager *m, DnsServer *s); |
0eac4623 LP |
142 | DnsServer *manager_get_dns_server(Manager *m); |
143 | void manager_next_dns_server(Manager *m); | |
144 | ||
b30bf55d LP |
145 | bool dns_server_address_valid(int family, const union in_addr_union *sa); |
146 | ||
12bf2331 LP |
147 | DnssecMode dns_server_get_dnssec_mode(DnsServer *s); |
148 | ||
8300ba21 TG |
149 | DEFINE_TRIVIAL_CLEANUP_FUNC(DnsServer*, dns_server_unref); |
150 | ||
d5099efc | 151 | extern const struct hash_ops dns_server_hash_ops; |
ce7c8b20 LP |
152 | |
153 | void dns_server_flush_cache(DnsServer *s); | |
59c0fd0e LP |
154 | |
155 | void dns_server_reset_features(DnsServer *s); | |
156 | void dns_server_reset_features_all(DnsServer *s); |